garjan4

garjan4 · 08-02-2009, 08:48 AM

I just started a Marine Tank about a month ago I have 6 Damsels in the tank the tank is 29 gals. I just checked the gravity and it read very high and also the rocks have turned a reddish brown color what's going on?

ericgreg · 08-02-2009, 09:06 AM

The red-brown is diatoms - an algae. If your SG is high that means too high salt content. Did you do all the normal stuff before adding the fish? Did the tank cycle? What else are you testing for? The diatoms are normal, they should go away.

Elegance Coral · 08-02-2009, 09:12 AM

You will need to add fresh water to replace evaporation or the salinity will climb to high. Before long you will need to remove some of those fish. That many damsels in a 29 will start killing each other off as they mature.